diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0e5361..99df8ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,13 @@
 Yii2 multiple input change log
 ==============================
 
-1.2.12 in development
+1.2.13 in development
 ---------------------
 
+1.2.12
+------
+- Hotfix: Fixed error when array_key_exits (kongoon)
+
 1.2.11
 ------
 
diff --git a/README.md b/README.md
index 7e31c15..7db01e3 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Yii2 widget for handle multiple inputs for an attribute of model
 [![License](https://poser.pugx.org/unclead/yii2-multiple-input/license)](https://packagist.org/packages/unclead/yii2-multiple-input)
 
 ##Latest release
-The latest version of the extension is v1.2.11. Follow the [instruction](./UPGRADE.md) for upgrading from previous versions
+The latest version of the extension is v1.2.12. Follow the [instruction](./UPGRADE.md) for upgrading from previous versions
 
 Contents:
 
diff --git a/composer.json b/composer.json
index 9a1de1e..f2968b2 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
         "yii2 tabular input"
     ],
     "type": "yii2-extension",
-    "version": "1.2.11",
+    "version": "1.2.12",
     "license": "BSD-3-Clause",
     "support": {
         "issues": "https://github.com/unclead/yii2-multiple-input/issues?state=open",